May weather forecast and climate
Columbia, SC

The Us State House of South Carolina, in Columbia, with the Wade Hampton Statue
The Us State House of South Carolina, in Columbia, with the Wade Hampton Statue

Weather in May

The last month of the spring, May, is also a moderately hot month in Columbia, South Carolina, with average temperature varying between 81.3°F (27.4°C) and 63.1°F (17.3°C).

Temperature

In Columbia, the average high-temperature marginally rises, from a warm 73.9°F (23.3°C) in April, to a still moderately hot 81.3°F (27.4°C). In May, in Columbia, the average low-temperature is 63.1°F (17.3°C).

Heat index

The average heat index is calculated to 85.8°F (29.9°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'feels like', or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional factors like activity, metabolic differences, clothing, and wind affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In May, the average relative humidity in Columbia is 73%.

Rainfall

In Columbia, South Carolina, it is raining for 13.8 days, with typically 2.32" (59mm) of accumulated precipitation. Throughout the year, in Columbia, there are 141.3 rainfall days, and 25.28" (642mm) of precipitation is accumulated.

Snowfall

March through November are months without snowfall.

Daylight

In May, the average length of the day is 13.9h.

Sunshine

The average sunshine in Columbia is 9.8h.

UV index

In Columbia, the average daily maximum UV index in May is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to the UV radiation for the average person.
Note: In May, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in May in Columbia?

The average high-temperature, in May, is 81.3°F (27.4°C), while the average low-temperature is 63.1°F (17.3°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), that combines relative humidity and air temperature, in May is estimated at 85.8°F (29.9°C).

What is the average humidity in May in Columbia?

In Columbia, South Carolina, the average relative humidity in May is 73%.

How many days does it rain in May in Columbia?

In Columbia, in May, it is raining for 13.8 days, with typically 2.32" (59mm) of accumulated precipitation.

When it does not snow in Columbia?

In Columbia, South Carolina, snow does not fall in March through November.

What is the average length of the day in May in Columbia?

The average length of the day in May is 13.9h.

How many hours of sunshine does Columbia have in May?

In Columbia, the average sunshine in May is 9.8h.

How high is the UV index in May in Columbia?

In Columbia, the average daily maximum UV index in May is 6. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV radiation.

Average temperature in May
Columbia, SC

Average temperature in May - Columbia, SC
  • Average high temperature in May: 81.3°F

The warmest month (with the highest average high temperature) is July (91.6°F).
The month with the lowest average high temperature is January (52.9°F).

  • Average low temperature in May: 63.1°F

The month with the highest average low temperature is July (73.8°F).
The coldest month (with the lowest average low temperature) is January (37.9°F).

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Average pressure in May
Columbia, SC

Average pressure in May - Columbia, SC
  • Average pressure in May: 30.02"

Months with the highest atmospheric pressure are January, November and December (30.14").
The month with the lowest atmospheric pressure is June (29.97").

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Average wind speed in May
Columbia, SC

Average wind speed in May - Columbia, SC
  • Average wind speed in May: 7.1mph

The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity in May
Columbia, SC

Average humidity in May - Columbia, SC
  • Average humidity in May: 73%

The month with the highest relative humidity is December (74%).
Months with the lowest relative humidity are January, July and November (69%).

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Average rainfall in May
Columbia, SC

Average rainfall in May - Columbia, SC
  • Average rainfall in May: 2.32"

The wettest month (with the highest rainfall) is December (2.91").
The driest month (with the least rainfall) is September (1.46").

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Average rainfall days in May
Columbia, SC

Average rainfall days in May - Columbia, SC
  • Average rainfall days in May: 13.8 days

The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is October (7.3 days).

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Average snowfall in May
Columbia, SC

Average snowfall in May - Columbia, SC
  • Average snowfall in May: 0"

The month with the highest snowfall is February (0.47").
Months with the least snowfall are March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in May
Columbia, SC

Average snowfall days in May - Columbia, SC
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (0.3 days).
Months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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Average daylight in May /
Average sunshine in May
Columbia, SC

Average daylight in May / Average sunshine in May - Columbia, SC
  • Average daylight in May: 13.9h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in May: 9.8h

The month with the most sunshine is July (Average sunshine: 10.7h).
The month with the least sunshine is December (Average sunshine: 5.3h).

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Average sunshine days in May
Columbia, SC

Average sunshine days in May - Columbia, SC
  • Average sunshine days in May: 15.6 days

The month with the most sunshine days is October (22.7 days).
The month with the least sunshine days is July (11.7 days).

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Average UV index in May
Columbia, SC

Average UV index in May - Columbia, SC
  • Average UV index in May: 6

Months with the highest UV index are June, July and August (UV index 7).
Months with the lowest UV index are January, February and December (UV index 3).

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Average cloud cover in May
Columbia, SC

Average cloud cover in May - Columbia, SC
  • Average cloud cover in May: 34

Months with the most cloud cover are February and December (Cloud cover 42).
Months with the least cloud cover are June and October (Cloud cover 29).

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Average visibility in May
Columbia, SC

Average visibility in May - Columbia, SC
  • Average visibility in May: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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